using System; using System.IO; namespace Azure.Storage { internal static class StorageProgressExtensions { public static Stream WithProgress(this Stream stream, IProgress<long> progressHandler) { if (progressHandler != null && stream != null) { AggregatingProgressIncrementer aggregatingProgressIncrementer = progressHandler as AggregatingProgressIncrementer; if (aggregatingProgressIncrementer != null) return aggregatingProgressIncrementer.CreateProgressIncrementingStream(stream); return new AggregatingProgressIncrementer(progressHandler).CreateProgressIncrementingStream(stream); } return stream; } } }